Improvement in grinding-mills



FRAKLI'N H. LAv PORT, OECLARINDA, IOWA.

Leners Patent No. 113,534,11md April'n, 1871.

IM'PRovMEN'riN -eRlNniNG-MILLS.

The Schedule referred to in these Letters Patent and z naking part ofthe same.

To all. whom it 'mayV concern:

Y Be it known that I, FRANKLIN H. LA PORT, of O1arinda, in the county ofPage and State of Iowa, have invented a new and useful Improvement inGrinding-Mills; and I do hereby declare that the following is afull,clear, and exact description thereof which will enable others skilled inthe art to make and use the same, reference being had to thevaccompanying drawing forming part of this specication.

The object of this invention is to provide ecient means for preventingthe heating of mill-stonesa'nd consequently the heating of the groundgrain, as' ilonr or meal inthe process of grinding and Y' It consists inforcing a current of air into the eye of the stone, and in a pipe fordischarging the dust, as hereinafter described.

The accompanying drawing represents a side view of `a grinding-stoneprovided with the forcing apparatus or blower and pipe.

Similar letters of reference indicate corresponding parts.

A represents the stone.`

B is the curb. i

G is the eye of the stone.

D represents a fau-blower, which is placed iu any convenient location,by which a current of cold air is forced into the eye of the stonethrough the pipe E, as seen in the drawing.

Thecurrent 'of cold air prevents the heating of the stone and the groundgrain. All dampness is carried' oft', dough is' prevented fromcollecting, and the genp eral operation of the mill is greatlyimproved.

The current of air passes through the lstone and connects with thedischarge-pipe F, through which the dust and air-current are discharged.

By keeping the stone cool and the air within the curb dry the liabilityof the products `of the mill to become sour, and consequently unt formarket, is prevented, while the mill itself works free and u nobstructed.

The whole operationis greatly facilitated by being kept at a propertemperature.

Having thus described my invention,

I claim as new and desire to secure by Letters Pateht- The arrangementof the blower D, with pipe E, eye O of the millstone A, casing B, andpipe F, when all are constructed and operated as hereinsh'own anddescribed, for the purposes set forth.

Witnesses: F. H. LA PORT.

N. L. VAN ZANDT,

. T. J. BRAGKEN-

